<template>
  <div class="bottom-menu">
    <CheckButton class="select-all" :isChecked="isSelectAll" @click.native="checkBtnClick"></CheckButton>
    <span>全选</span>
    <span class="total-price">合计:{{totalPrice}}</span>
    <span class="buy-product">去计算({{checkLength}})</span>
  </div>
</template>

<script>
import CheckButton from '@/components/content/checkButton/CheckButton'

import { mapGetters } from 'vuex'

export default {
  name: 'CartBottomBar',
  data () {
    return {
      // isSelectAll: false
    }
  },
  components: {
    CheckButton
  },
  methods: {
    checkBtnClick () {
      // 1.判断是否有未选中的按钮
      let isSelectAll = this.cartList.find(item => !item.checked) //
      console.log(isSelectAll) //
      // 2.有未选中的内容, 则全部选中
      if (isSelectAll) {
        this.cartList.forEach(item => {
          item.checked = true
        })
      } else {
        this.cartList.forEach(item => {
          item.checked = false
        })
      }
    }
    // calcClick () {
    //   if (!this.isSelectAll) {
    //     this.$toast.show('请选择要购买的商品')
    //   }
    // }
  },
  created () {
    console.log(this.cartList)
  },
  computed: {
    ...mapGetters(['cartList']),
    totalPrice () {
      return '￥' + this.cartList.filter(item => {
        return item.checked
      }).reduce((preValue, item) => {
        return preValue + item.count * item.price
      }, 0).toFixed(2)
    },
    isSelectAll () {
      if (this.cartList.length === 0) return false
      return this.cartList.find(item => item.checked === false) === undefined
    },
    checkLength () { // 去计算--商品选中的个数
      return this.cartList.filter(item => item.checked).length
    }
  }
}
</script>

<style scoped>
/* .bottom-menu{
    width: 100%;
    position: fixed;
    bottom: 49px;
    background-color: #eee;
    display: flex;

    height: 40px;
    line-height: 40px;
  }

  .check-content{
      display: flex;
      align-items: center;
      margin-left: 10px;
  }
  .check-button {
      width: 20px;
      height: 20px;
      line-height: 20px;
      margin-right: 5px;
  }
  .price {
    margin-left: 15px;
    font-size: 16px;
    color: #666;
  } */

.bottom-menu {
  width: 100%;
  height: 44px;
  background-color: #eee;
  position: fixed;
  bottom: 49px;
  left: 0;
  box-shadow: 0 -2px 3px rgba(0, 0, 0, 0.2);
  font-size: 14px;
  color: #888;
  line-height: 44px;
  padding-left: 35px;
  box-sizing: border-box;
}

.bottom-menu .select-all {
  position: absolute;
  line-height: 0;
  left: 12px;
  top: 13px;
}

.bottom-menu .total-price {
  margin-left: 15px;
  font-size: 16px;
  color: #666;
}

.bottom-menu .buy-product {
  background-color: orangered;
  color: #fff;
  width: 100px;
  height: 44px;
  text-align: center;
  line-height: 44px;
  float: right;
}
</style>
